Disk wheel



- March ZO, 1928.

C. WERRA ET AL DISK WHEEL Fil'ed July 14. 1922' fig. 5.

A TTORNEYS.

Patented Mar. 20, 1928.

UNITED STATES CONRAD WERRA AND JOHN TJWATRY, OF WAUKESHA, WISCONSIN.

DISK WHEEL.

Application filed July 14, 1922. Serial No. 574,942.

This invention relates to disk wheels and more particularly to doubledisk wheels formed with a divided rim. 7

One of the features of this invention resides in the connection betweenthe two disks in the neighborhood of the rim, which is effected by meansof coupling members arranged on the disks, these coupling members beingbrought into engagement with one another by moving the disks toward eachother.

A further feature of this invention resides in the fact that the twodisks jointly are detachably secured to the hub by means of a wheel capand that the disks are provided in the vicinity of the hub withperforations which register when the coupling members at the rimmutually engage one another, driving pins carried by, the hub passingthrough these registering perforations to establish a driving connectionbetween the hub and both disks. 7

An advantage of the structure forming the subject matter of thisinvention is that both disks can be detached from the hub for thepurpose of changing a, tire and that these disks, after the new tire hasbeen put in place, can be put together and jointly mounted again on tothe axle-tree, thus materially facilitating the changing of tires.

Another advantage of this structure is that a separate tire may beconveniently carried on a pair of the disks and placed on one of theaxle-trees when the occasion demands. I

This structure furthermore is distinguished fromknown double disk wheelswith divided rims by its simplicity of construction which not onlyinsures its durability but is conducive of rapid and convenientdismounting and assembling. i

In addition to the above features, the invention consists in the novelcombination, arrangement, and construction of parts more fullyhereinafter described and illustrated in the accompanying specificationand drawings.

In the drawings; 7

Figure 1 is a side elevation of a wheel, partly in section, constructedin accordance with this invention;

Fig. 2 is-a similar view of the inner side of the wheel, also partly insection; and,

Fig. 3 is a vertical section taken on the plane indicated by line 38 inFig. 2.

Referring now to the drawings wherein like reference characters indicatelike parts,

it will be seen that the wheel comprises an inner disk 10 and an outerdisk 11, mounted to rotate with a hub 12 in a manner to be more fullyhereinafter described. The periphery of each disk is shaped t form a rim18 for the reception of the tire in the usual manner. Disposed aroundthe periphery of the disk 11 and preferably cast integrally therewith isa plurality of lugs lt. The disk 10 has formed integrally therewith acorresponding number of bosses or enlargements 15, disposed adjacent itsperiphery. The lugs 14 and bosses 15 are each perforated and formed withgrooves and shoulders on their adjacent faces for the purpose ofproviding a chamfered tongue and groove connection or joint 16 betweenthe disks 10 and 11 at these points. Bolts 17 passing through thealigned perforations in thelugs 14 and bosses 15 tend to draw togetherand firmly lock the disks 10 and 11 relativelyto one another, thuspreventing parallel movement of one disk relative to one another whenthe wheel islsubjected to forces such as result from ordinary drivingand also particularly in making turns, striking curbs, etc.

The hub 12 is provided with a radial flange 17 from which radiallyproject a plurality of driving or coupling pins 18. These pins arepreferably shouldered and riveted to the flange 17 at spaced radialpoints. Adja cent the inner periphery of the disk lO there is formed aplurality of radially disposed apertures19, while the diskll is providedwith a flanged extension 20, also provided with aplurality of laterallydisposed apertures 21.

In assembling the wheel the aperatures 19 and 21 formed inthe disks 10and 11 re spectively, are caused to come into registration so as toreceive" the driving pins 18, whereby both disks are subjected to adriving]O or rotative force in the vicinity of the hu 1 The innerperiphery of each disk 10 is formed with an enlarged tapering surface 22while the inner periphery of the disk 11 is formed with a correspondingtapered surface 23. The hub 12 is, tapered adjacent its inner end asindicated at 24, thereby providing a surface which co-operates with thetapered surface 22 of the inner disk, while a hub cap 25, designed tolock the wheel to the hub is formed with a tapered surface 26 whichcooperates in a like manner with the tapered portion 23 of the outerdisk.

The disks 10and11 are each formed with a short bevelled surface at theirpoint of engagement, indicated by the reference-character 27, wherebythe assembling of the two disks is facilitated by causing them to cometogether concentrically with one another, thereby elin'iinating thepossibility of a relative parallel. moveinent of the disks.

The tire, (not shown), is mounted as usual on the divided rim toririedjointly by the outer periphery of the two disks. The hub 12 is fixed tothe axle in the usual manner and the wheel, composed mainly oi the twodisks, 10 and 11., is'held in place on the hubv by means of the hub capTo remove the wheel it is only necessary, therefore, to remove the hubcap 25. Should it e desired then tochange a tire, the disks 10 and 11are disassembled by removing the nuts from the bolts 17. \Viththc disk10 disassembled from the disk 11 the tire may be may removed from itsseat.

Obviously aiter ncw tire has been put in place and the disk againclamped together at their peripheries by means of the bolts 1.7, thetwodisks may then be jointly pushed on to the hub, the apertures 19 and21 adjacent the hub being in alignment for the reception of the drivingpins 1 8. As mentioned here inbefore, the wheel may then be locked inplace upon the hub 12 by screwing into place the hub cap 25.

. Obviously the co-operating bevelled surfaces 22 and 2% on the onehand, and 23 and 26 on the other hand, tend to center the wheel asawhole and to provide a firm and rigid connection between the wheel andthe hub. Furthermore the assembling of the two d sks is facilitated byreason of the (Io-operating bevelled surfaces at the point indicated inthe drawings at 27.

This point of engagement oi? the disks l0 and ll insures a concentricpositioning of the disks to more securely hold the parts together when,the parts are assentibled.

It should be noted that the driving pins 1.8 are of sufficient length toproject through the disk 10 and also through theflangedextension 20 ofthe disk 11, thereby driving both disks simultaneously and causing therotative' force to be effected in thevicinity of the hub. Attention isalso directed to the manner in which the disks 10 and 11 are clampedadjacentthe periphery thereof. The chamtered groove and shoulderprovided at the juncture of each lug and boss insures a closefit wherebythe bolts 17 may clamp the disks so as to prevent a rubbing or frictionof the disks caused by a relative movement between the same.

The wheel will preferably, although not necessarily, be formed ofaluminum, which metal possesses a high degree of heat conductivity.Therefore the heat created by the tire from the friction at the treadthereof is radially conducted into the wheel and radiated, particularlysince the tire is in direct contact a ith thewheel, owing to theelimination of a separate riinmember. Furthermore a wheel constructed inaccordance with thisinvention possesses unusual lightness for itsstrength, and itsconstruction further provides that sufficient metal toinsure proper strength is disposed at the places where the greatestpressare is exerted.

The wheel mentioned hereinbetore may be easily detached, thisoperationrequiring only a single wrench. In addition to this,

the wheel possesses all the usual advantages of disk Wheels withreference to appearance and ease in washing.

WVhile the particular arrangement and construction described andillustrated herein has proven to be etlicient in every respect it notintendedthat this invention. should he unnecessarily ldlUltQCibllhreservation is made to make such chany in construction and arrangementof parts asinay come within the purview of the accompanying claim.

Having: thus described the invention what is claimed is i f x In a diskwheel adapted to receive a pneumatic tire, a hub, a pair of disksdctachably mounted on said hub, a plurality of radially disposedlugsiiormed on one of said disks,

a corresponding number of radially disposeiil bossestormedon the otherof said disks, said lugs and bosses being. fmrn'ied with cl'ia'm'feredgrooves andshoulders, bolts cooperat'ine: withsaid lugs and bosses forcoupling said. disks together, said disks being journalled on siiid'hub. i

In. testimony whereof we atlix our signatures.

CONRAD Wanna. JOHN T. VVATRY.

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